Haripuñjaya was a Mon kingdom in what is now Northern Thailand, existing from the 7th or 8th to 13th century CE. Its capital was at Lamphun, which at the time was also called Haripuñjaya. In 1292 the city was besieged and captured by Mangrai of the Tai kingdom of Lan Na.

Kam Mueang or Northern Thai language is the language of the Northern Thai people of Lanna, Thailand. It is a Southwestern Tai language that is closely related to Tai Lue language. Kam Mueang has approximately six million speakers, most of whom live in the native Northern Thailand, with a smaller community of Lanna speakers in northwestern Laos.